#include <stdio.h>
int main(int argc, char *argv[]){


    FILE* pf = fopen("FILE_filenotest.txt", "w");
    printf("stdin 键盘: %d\n", stdin->_fileno);
    printf("stdout 显示器: %d\n", stdout->_fileno);
    printf("stderr 显示器: %d\n", stderr->_fileno);
    printf("new open: %d\n ",pf->_fileno);
    return 0;
}
